In my own personal opinion any program that receive funds from an investors and offer them higher returns in a short period is a ponzi but this program is in a beta but takes in payment and tends to doubled it.
Whether the investment is safe or real is a secondary question.
This is not a Ponzi because no coins will be returned at all. This is a reading comprehension and bitcoin network lesson
With zero transaction confirmations doesn't it mean that even his 4 BTC investment would be stuck for some time.
I normally don't invest in such sort of tricks unless I am absolutely certain that I would get my base investment back. Same is the case over here haven't put my money yet...unless the doubts are clear

Can't really understand what exactly is going on over here
